JP2001001278A - Nail jamming detecting mechanism for nailing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely detect the nail jamming by mounting a nail feeding member capable of feeding nails one by one fro a magazine to a noise part, in a reciprocative manner in the nail feeding direction, and detecting the operation of this nail feeding member by a detecting means. SOLUTION: When a driver is driven, and a nail 5a facing to an injection hole 4 of a nose part, among linked nails 5 in a magazine, is driven, a nail feeding mechanism 6 is operated. That is, by the reciprocation of a piston rod 8b of an air cylinder 7, only one nail is fed by a feeding claw 8c. On this occasion, when the nail 5a is moved sufficiently to be fed to the nose part 3 by the reciprocation of the piston rod 8b, an actuator 13a is downwardly pressed by a point inclined surface 15, and a mechanical valve 13 outputs an on-signal. But when the nail 5a is jammed in the injection hole 4, the actuator 13a is insufficiently pressed, the mechanical valve 13 is off, and a nail jamming detection signal is output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clogging detection mechanism for detecting that a nose of a nailing machine driven by air pressure, electricity or the like is clogged with a nail.

[0002]

2. Description of the Related Art A nail driving machine supplies nails stored in a magazine one by one to an injection hole of a nose portion, and strikes and nails the nail in the nose portion with a driver driven by compressed air or the like. At the time of such a driving operation, sometimes the nail is buckled when the nail in the nose portion is hit, and the nail may be clogged in the injection hole. If the next nail is fed into the injection hole and the nailing machine is hit when the nail is jammed, poor feeding of the nail may occur or the nose may be damaged.

[0003] Japanese Patent Application Laid-Open No. 8-72013 is known as a mechanism for detecting such clogging when a nail is clogged. This is because a slide shutter 15 is provided in the injection hole 7 so as to be able to protrude and retract, and when a clogging of a nail occurs, the slide shutter 15 cannot reach a set position due to a bent nail. Is to be detected.

[0004]

However, since the nail clogging detection mechanism is premised on a nailing machine for loose nails, a nailing machine of a system for feeding a connecting nail stored in a magazine to a nose portion is used. Was not applicable.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clogging detecting mechanism which can be applied to a nailing machine of a system for feeding a connecting nail to a nose portion.

[0006]

In order to solve the above-mentioned problems, a nail clogging detection mechanism for a nailing machine according to the present invention comprises a nail feeder for feeding nails one by one from a magazine of the nailer to a nose portion. The nail feed member is reciprocally movable in the direction
In the vicinity of the nail feeding member, there is provided a detecting means for detecting that the nail feeding member has supplied the nail to the nose portion.

[0007]

FIG. 1 shows a main part of a nailing machine. This nailing machine includes a driver 2 in a striking mechanism (usually a striking piston / cylinder mechanism) provided in a body 1, and drives the driver with compressed air to drive a nail 5 in an injection hole 4 of a nose portion 3.
a, and is driven into the material to be driven.
Is fed from the magazine (not shown) to the nose part 3 by the nail feed mechanism 6.

A nail feeding mechanism 6 is provided with a nail feeding member 8 shown in FIG. 2 on an air cylinder device 7 provided in a nail feeding direction, and the connecting nail 5 housed in the magazine by the operation of the nail feeding member 8 is connected to a nose portion. It is configured to feed the nails one by one to 3.

That is, as shown in FIG. 2, the nail feed member 8 is provided with a piston 8a provided reciprocally in the air cylinder device 7, a piston rod 8b integrally connected to the piston 8a, and a rotating tip. And a feed claw 8c movably attached. Piston rod 8b
Is formed in a V-shape. The feed claw 8c is pivotally attached to a support shaft 9 provided at the tip of the piston rod 8b so as to rotate clockwise from the posture shown in the figure.
It is always urged to take the posture shown in FIG. The air cylinder device 7 reciprocates the piston 8a and the piston rod 8b using compressed air as a driving source.
Following this, the feed claw 8c reciprocates between the magazine and the nose portion 3. The feed claw 8c is disposed so as to engage with the shaft of the nail 5a of the connecting nail 5, and feeds only one nail forward (toward the nose portion 3) during forward movement, and rotates clockwise in the drawing when moved backward. Over the rear nail and engage behind the nail axis. After the nail is sent to the nose part 3, the hitting mechanism is operated as described above, and the nail 5a is driven. Then, when the air cylinder device 7 operates, the feed claw 8c again moves the nail forward by one. In this way, the nails are sequentially fed into the nose portion 3 by the feed claws 8c.

Next, near the nail feeding member 8, a detecting means for detecting that the nail feeding member 8 has supplied the nail to the nose portion 3 is provided. This detecting means is constituted by a mechanical valve 13 as shown in FIG. One end of an actuator 13 a is rotatably provided on the mechanical valve 13, and the other end of the actuator 13 a is provided with a roller 1.
4 is attached. The actuator 13a is always spring-biased so as to be at the top of the drawing. The roller 14 is provided so as to engage with the tip of the piston rod 8b. When the piston rod 8b is at the initial position, the roller 14 is positioned at the tip inclined surface 15 of the piston rod 8b.
Lightly engage with. When the piston rod 8b moves forward, the roller 14 is pushed downward, the actuator 13a swings downward in the drawing, the air passage 11 provided with the mechanical valve 13 opens or closes, and an ON signal is output. Is set to Further, if the ON signal is not output within the time from the start of the operation of the air cylinder device 7 to the movement of the piston rod 8b to the forward end, an OFF signal (a nail clogging detection signal) is output. ing.

Next, a description will be given of an operation mode of the nail clogging detection mechanism having the above-described configuration. When the driver 2 is driven to perform the nail driving operation, the nail feed mechanism 6 is operated to move the piston rod 8b forward. The feed claw 8c feeds only one nail to the nose portion 3 side. When the piston rod 8b moves forward enough to supply the nail 5a to the nose portion 3, the tip of the feed claw 8c is inclined. As shown in FIG. 3, the actuator 13a is pushed in by the surface 15 together with the roller 14 and swings downward, so that the mechanical valve 13 outputs an ON signal. Thereby, it can be detected that the nail feeding has been normally performed. After the nail feeding, when the piston rod 8b moves back and the next nail feeding is prepared, the actuator 13a jumps up again.

By the way, the nose 3
When the injection hole 4 is clogged with a nail, the injection claw 8c moves to a predetermined forward end because the injection hole 4 is closed by the clogged nail when the piston rod 8b moves forward. It is not possible. Therefore, since the piston rod 8b cannot swing the actuator 13a of the mechanical valve 13, an off signal and a clogging / clogging detection signal are output at this time. As a result, it is possible to know that the nail is clogged, so that the driving of the driver 2 may be stopped, the clogging nail may be removed, and then the nail driving operation may be restarted.

The detection means for detecting that the nail feeding member 8 has approached the forward end when feeding the nail is not limited to the above-described mechanical valve 13. For example,
The detection means may be constituted by a proximity sensor, and the proximity sensor may detect that the piston rod 8b has approached the forward end, and may be electrically switched when the piston rod 8b reaches near the forward end. May be turned on to output a signal.

As described above, the nail clogging detection mechanism includes:
In order to feed the nails one by one from the magazine to the nose part 3, a nail feeding member 8 is provided so as to be able to reciprocate in the nail feeding direction, and the detecting means detects that the nail feeding member 8 has fed the nail. Therefore, when the nail is jammed in the nose portion 3, the nail feeding member 8 cannot feed the nail, so that the detecting means detects the nail and outputs a signal to detect the nail jam.

Further, since the nail feeding state is detected based on the operating state of the nail feeding member 8 instead of directly detecting the presence or absence of a nail in the nose part 3, the nail feeding of the connecting nail 5 is obstructed. And never.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a nailing machine provided with a clogging detection mechanism according to the present invention.

FIG. 2 is a bottom view of the nail clogging detection mechanism.

FIG. 3 is an explanatory view of an operation mode of the nail clogging detection mechanism.

[Explanation of symbols]

 3 Nose part 5 Connecting nail 8 Nail feeding member 13 Mechanical valve (detection means)

Claims (1)

[Claims] 1. A nail is inserted into a nose from a magazine of a nailing machine.
A nail feeding member is provided so as to be reciprocally movable in the nail feeding direction for feeding the books one by one, and near the nail feeding member, a detecting means for detecting that the nail feeding member has supplied the nail to the nose portion is provided. A nail clogging detection mechanism for a nailing machine.